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Tokamaks

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A nuclear fusion reactor in which a magnetic field keeps charged, hot plasma moving in a doughnut-shaped vacuum container.

New testing of model improves confidence in the performance of ITER

Scientists seeking to bring fusion — the power that drives the sun and stars — down to Earth must first make the state of matter called plasma superhot enough to sustain fusion reactions. That calls for heating the plasma to many times the temperature of the core of the sun. In ITER, the international fusion facility being built in France to demonstrate the feasibility of fusion power, the device will heat both the free electrons and the atomic nuclei — or ions — that make up the plasma.

New testing of model improves confidence in the performance of ITER

Scientists seeking to bring fusion — the power that drives the sun and stars — down to Earth must first make the state of matter called plasma superhot enough to sustain fusion reactions. That calls for heating the plasma to many times the temperature of the core of the sun. In ITER, the international fusion facility being built in France to demonstrate the feasibility of fusion power, the device will heat both the free electrons and the atomic nuclei — or ions — that make up the plasma.

William Tang wins 2018 Global Impact Award to advance development of AI software to help create “a star on earth”

Physicist William Tang has won a highly competitive $100,000 Global Impact Award from NVIDIA Corp., the leading producer of graphics processing units (GPUs) for carrying out artificial intelligence (AI) computing.  This award was one of two presented at the NVIDIA national GPU technology conference held March 26-29 in San Jose, California.

William Tang wins 2018 Global Impact Award to advance development of AI software to help create “a star on earth”

Physicist William Tang has won a highly competitive $100,000 Global Impact Award from NVIDIA Corp., the leading producer of graphics processing units (GPUs) for carrying out artificial intelligence (AI) computing.  This award was one of two presented at the NVIDIA national GPU technology conference held March 26-29 in San Jose, California.

Chirping is welcome in birds but not in fusion devices – scientists show that weak turbulence makes chirping more likely

Birds do it and so do doughnut-shaped fusion facilities called “tokamaks.” But tokamak chirping— a rapidly changing frequency wave that can be far above what the human ear can detect — is hardly welcome to researchers who seek to bring the fusion that powers the sun and stars to Earth.  Such chirping signals a loss of heat that can slow fusion reactions, a loss that has long puzzled scientists.

Chirping is welcome in birds but not in fusion devices – scientists show that weak turbulence makes chirping more likely

Birds do it and so do doughnut-shaped fusion facilities called “tokamaks.” But tokamak chirping— a rapidly changing frequency wave that can be far above what the human ear can detect — is hardly welcome to researchers who seek to bring the fusion that powers the sun and stars to Earth.  Such chirping signals a loss of heat that can slow fusion reactions, a loss that has long puzzled scientists.

Drifting and bouncing particles can help maintain stability in fusion plasmas

A key challenge in fusion research is maintaining the stability of the hot, charged plasma that fuels fusion reactions inside doughnut-shaped facilities called “tokamaks.” Physicists at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL), have recently found that drifting particles in the plasma, which consists of free electrons and atomic nuclei, can forestall instabilities that reduce the pressure crucial to high-performance fusion reactions inside these facilities.

Drifting and bouncing particles can help maintain stability in fusion plasmas

A key challenge in fusion research is maintaining the stability of the hot, charged plasma that fuels fusion reactions inside doughnut-shaped facilities called “tokamaks.” Physicists at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL), have recently found that drifting particles in the plasma, which consists of free electrons and atomic nuclei, can forestall instabilities that reduce the pressure crucial to high-performance fusion reactions inside these facilities.

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